View Compilation Error

0_0_33440206_10603.cpp: In function 'int main()':
0_0_33440206_10603.cpp:17:3: error: expected ';' before '}' token
   }else{
   ^
0_0_33440206_10603.cpp:17:4: error: 'else' without a previous 'if'
   }else{
    ^
0_0_33440206_10603.cpp:18:4: error: 'c' was not declared in this scope
    c=a/2;
    ^
0_0_33440206_10603.cpp:18:6: error: 'a' was not declared in this scope
    c=a/2;
      ^
0_0_33440206_10603.cpp:19:4: error: 'd' was not declared in this scope
    d=a/2;
    ^
0_0_33440206_10603.cpp:20:4: error: 'b' was not declared in this scope
    b/=2;
    ^
0_0_33440206_10603.cpp: At global scope:
0_0_33440206_10603.cpp:26:2: error: expected unqualified-id before 'return'
  return 0;
  ^
0_0_33440206_10603.cpp:27:1: error: expected declaration before '}' token
 } 
 ^